In the following statements, tick ‘T’ against those which are true, and ‘F’ against those which are false :
A.
The number of oscillations per second of a vibrating object is called its time period.State True or False:
If the amplitude of vibration is large, sound is feeble.
gases only
solids only
liquids only
solids, liquids and gases
D.
solids, liquids and gases